add 404 page and style

Author: panoramine

pages/404.js

@@ -0,0 +1,11 @@
+import Link from 'next/link'
+const NotFound = () => {
+  return (
+    <div className="not-found">
+      <h1>Ooops...</h1>
+      <h2>That page cannot be found :(</h2>
+      <p>Go back to the <Link href="/"><a>Homepage</a></Link></p>
+    </div>
+  );
+}
+export default NotFound;

styles/globals.scss

@@ -20,3 +20,14 @@ a {
   box-sizing: border-box;
 }
 
+.not-found {
+  text-align: center;
+}
+
+.not-found a {
+  color: $accent-color;
+  
+  &:hover {
+    opacity: 0.6;
+  }
+}